class ActiveStorage::Attachment

def transform_variants_later
  preprocessed_variations = named_variants.filter_map { |_name, named_variant|
    if named_variant.preprocessed?(record)
      named_variant.transformations
    end
  }
  if blob.preview_image_needed_before_processing_variants? && preprocessed_variations.any?
    blob.create_preview_image_later(preprocessed_variations)
  else
    preprocessed_variations.each do |transformations|
      blob.preprocessed(transformations)
    end
  end
end